Maintenance Program shall mean the Lessee's FAA-approved MSG-3 maintenance program for McDonnell Douglas model DC-9-82 (Boeing MD-80 series) aircraft, or such other FAA-approved manufacturer's maintenance program as in effect from time to time for the Aircraft encompassing scheduled maintenance, condition-monitored maintenance and on-condition maintenance of the Airframe, Engines and components of the Aircraft as shall be approved by Lessor. Lessee's Maintenance Program shall not deviate materially from the respective Manufacturers' recommended MSG-3 maintenance planning documents. 



Maintenance Reserves shall mean the Maintenance Reserve Payments for the Aircraft specified on Exhibit C payable by the Lessee throughout the Term pursuant to Section 4(a) and Section 6(g) hereof.



Operative Agreements shall mean this Lease, any Lease Supplement, any Permitted Sublease, any Security Agreement, the Participation Agreement, and any other documents and agreements executed and delivered by Lessor, Lessee and any Sublessee, or any Lessor Lender or any other Person in furtherance of the transactions contemplated hereby and thereby.



Participation Agreement shall mean that certain Aircraft Participation Agreement dated as of the date hereof among Lessee, Lessor and certain affiliates of Lessor.



Parts shall mean all appliances, components, parts, instruments, appurtenances, avionics, accessories, furnishings and other equipment of whatever nature (other than complete Engines or engines), which may now or from time to time be incorporated or installed in or attached to the Airframe or any Engine. Except as otherwise set forth herein, only at such time as a replacement part shall be substituted for a Part in accordance with Section 9 hereof, shall the Part so replaced cease to be a Part hereunder.